Fig. 1From: Exogenous auxin regulates multi-metabolic network and embryo development, controlling seed secondary dormancy and germination in Nicotiana tabacum L.A graphical representation of exogenous auxin levels controlling seed dormancy. Germination of seeds imbibed in supplementation IAA solution or ddH2O 24Â h or untreated and then germinated on filter paper beds 156Â h. Subscript 10, 100, 1000 indicated the concentration gradientsBack to article page